نتایج جستجو برای: temperature elevation

تعداد نتایج: 518976  

2014
Aurore Coince Tristan Cordier Juliette Lengellé Emmanuel Defossez Corinne Vacher Cécile Robin Marc Buée Benoît Marçais

The diversity of fungi along environmental gradients has been little explored in contrast to plants and animals. Consequently, environmental factors influencing the composition of fungal assemblages are poorly understood. The aim of this study was to determine whether the diversity and composition of leaf and root-associated fungal assemblages vary with elevation and to investigate potential ex...

Journal: :Physics in medicine and biology 2016
Jose Gomez-Tames Yukiya Sugiyama Ilkka Laakso Satoshi Tanaka Soichiro Koyama Norihiro Sadato Akimasa Hirata

Transcranial direct current stimulation (tDCS) is a neuromodulation scheme where a small current is delivered to the brain via two electrodes attached to the scalp. The electrode design is an important topic, not only as regards efficacy, but also from a safety perspective, as tDCS may be related to skin lesions that are sometimes observed after stimulation. Previous computational models of tDC...

2013
Israel Del Toro

Studies of species diversity patterns across regional environmental gradients seldom consider the impact of habitat type on within-site (alpha) and between-site (beta) diversity. This study is designed to identify the influence of habitat type across geographic and environmental space, on local patterns of species richness and regional turnover patterns of ant diversity in the northeastern Unit...

2011
Rui-Chang Quan Guopeng Ren Jocelyn E. Behm Lin Wang Yong Huang Yongcheng Long Jianguo Zhu

Environmental factors that affect spatiotemporal distribution patterns of animals usually include resource availability, temperature, and the risk of predation. However, they do not explain the counterintuitive preference of high elevation range in winter by the black-and-white snub-nosed monkey (Rhinopithecus bieti). We asked whether variation of sunshine along with elevations is the key drivi...

2002
Eli Tziperman

(Ghil [14]) Assume that higher elevation of the ice sheet surface results in colder ice-sheet surface temperature, therefore in less ablation, and therefore in more net accumulation (i.e. opposite of the elevation-desert effect). As the ice volume increases, the ice sheet sinks into the bedrock, moving more of the the glacier surface area into an elevation of less accumulation/ more ablation (o...

2013
Lauren B. Buckley Ethan F. Miller Joel G. Kingsolver

Synopsis Gradients of air temperature, radiation, and other climatic factors change systematically but differently with altitude and latitude. We explore how these factors combine to produce altitudinal and latitudinal patterns of body temperature, thermal stress, and seasonal overlap that differ markedly from patterns based solely on air temperature. We use biophysical models to estimate body ...

Journal: :Integrative and comparative biology 2013
Lauren B Buckley Ethan F Miller Joel G Kingsolver

Gradients of air temperature, radiation, and other climatic factors change systematically but differently with altitude and latitude. We explore how these factors combine to produce altitudinal and latitudinal patterns of body temperature, thermal stress, and seasonal overlap that differ markedly from patterns based solely on air temperature. We use biophysical models to estimate body temperatu...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 0

a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده علوم 1391

abstract in the present research solution of chalcopyrite in sulfuric acid in hydrometallurgy method using electrochemistry with cyclic voltammetry technique has been investigated. the value of maximum reduction peak current of copper ions represents the measure of solubility. in this research different parameters temperature, potential, potential exert time, chalcopyrite concentration, sulfur...

Journal: :Journal of clinical pathology 1980
G Madiedo R Sciacca L Hause

The effect of temperature, time of storage, and presence of air bubbles in specimens for blood gas analysis was studied. The results show that air bubbles in a 10% proportion are undesirable because of significant elevation in the PO2, and the storage of anaerobic blood samples at room temperature (25 degrees C) is acceptable when measurements are done within the first 20 minutes.

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